THEATER 10 Lecture Notes - Lecture 21: Extracellular Matrix, Nervous Tissue, Muscle Tissue
Course CodeTHEATER 10
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Histology - study of tissues in human body & how tissues are arranged to constitute organs (+
disease detection & diagnosis)
4 fundamental tissues
Tissues made up of cells & extracellular matrix.
• Extracellular matrix can be present, prominent, or absent.
Extracellular Matrix Functions
• Mechanical support to cell
• Transport nutrient to cell
• Carry out waste product
• Protection of cell
o Cell produce extracellular matrix as well as influenced by it.
Many molecules of matrix attach to receptors on cell surfaces.
Formation of Tissue
• Formed by arrangement of cells (and cells collectively can create extracellular matrix)
• Organs usually contain combo of the 4 tissues, except central nervous (which is formed
solely by nervous tissue)
o Combo of the tissues & how they're arranged determines how they function, behave
(disease) & work together to maintain health.
onnective tissue -- abundance of extracellular material produced by its cell
Muscle -- elongated cell that contracts
Nerve -- elongated process that receive, generate, and transmit nerve pulses.
Most organs can be divided into 2 components:
1. Parenchyma -- cells responsible for main function typical
2. Strome -- supporting tissue
a. Connective tissue
Nervous system does not have connective tissue
Epithelium - covering tissue, also absorbs, filters and secretes.
Distinguish between four tissue groups:
• Presence or absence of extracellular matrix
What are the arrangements of tissue groups in relation to major organ systems?
Tissues - group of cells of similar structure that perform a common function
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